DeltaOHM HD 9212 Manuals

HD 9212 INSTRUCTIONS MANUAL – 15 – HD 9212 ENGLISH pHMETER THERMOMETER GENERAL CHARACTERISTICS The instrument allows measurements of pH, mV or temperature to be ta- ken with a passive 4-wire Pt100 probe of the series TP9... pH measurement It is possible to take pH measurements by connecting a pH electrode to the instrument (Fig. 1). While measuring pH the instrument performs temperature compensa- tion with the set temperature value. pH measurement is possible in the range from -2.00 to 16.00 pH; the work range is from 0.00 to 14.00 pH and the value is indicated in hundredths of pH. If the measurement exceeds the indicated limits or the electrode is not connected, the Err code appears on the display. mV measurement When a pH electrode, an electrode for measuring the redox potential or a specific ion electrode is connected, the instrument performs mV measurement (Fig. 1). mV measurement is in the range ±1999 mV. The mV resolution of the instrument is 0.1 mV in the range ±199.9 mV and 1 mV in the remain- ing range. If the measurement exceeds the indicated limits or the electrode is not connected, the Err code appears on the display. ENGLISH – 16 – EURO S7 CAP Fig. 1 Temperature measurement Temperature measurements may be taken by connecting to the instru- ment a 4-wire Pt100 probe of the series TP9... (Fig. 2). Temperature measurement is possible in the range from -50.0°C to -199.9°C. The resolution of the instrument is 0.1°C. The temperature may be displayed in either Centi- grade or Fahren- heit degrees. If no temperature probe is fitted (and the pH or mV probe is fit- ted), the compen- sation tempera- ture of the pH electrode is dis- played, the set- ting of which is described below. If the temperature m e a s u r e m e n t exceeds the indi- cated limits or the electrode is not connected, and there is no pH or mV probe con- nected, the Err code appears on the display. Switching the instrument on and off The instrument is switched on and off by pressing the On/Off button. While switching on the instrument, all the symbols light up on the dis- play for 2 seconds (test display), and the set calibration code of the instrument (with the messages C01, C02 or C03), used for measure- ment, and the pH measurement value are shown. Auto power off The instrument is provided with an auto power off function which switch- es it off 8 minutes after the last button has been pressed. ENGLISH – 17 – Temperature probe 6 7 3 8 Pt100 6 1 4 7 3 5 8 2 7 3 5 6 1 4 8 2 3 8 6 7 Pt100 Fig. 2